Alfred "Alf" Lennon (14 December 1912 – 1 April 1976) was the father of English musician John Lennon. He spent many years in an orphanage—with his sister, Edith—after his father died. He was known as being very witty and musical throughout his life—he sang and played the banjo—but not as being very dependable. Although always known as Alf by his family, he later released a record as Freddie Lennon, and was quoted in newspapers under that name.

He married Julia Stanley in 1938. John was their only child together, but as Alf was often away at sea during World War II, he did not see much of his child during his infancy. During this period, Julia became pregnant with another man's child. He offered to look after his wife, their child and the expected baby, but Julia rejected the idea. He had very little contact with his son until Beatlemania, when they met again, but later had only intermittent contact with each other. He died in Brighton, where he had gone to live after marrying 19-year-old Pauline Jones.